Okanagan Lake in British Columbia is said to be the home of a world-famous lake monster named Ogopogo. This sea serpent is said to be 40-50 ft long and described as dark and multi-humped, with green, black, brown or grey skin. The head is said to look like that of a snake, sheep, horse, seal or even an alligator. The geological features of Lake Okanagan create long, unusual waves that can look exactly like the monster, down to Ogopogo’s signature series of humps. A sighting of a moving hump in the water is not an aquatic optical illusion, but instead something almost as mundane: floating logs.